Tax Credit Mismatch vs Form 26AS: Finding and Fixing TDS Discrepancies in Your ITR

The Scenario

You are a salaried taxpayer who filed your return for Assessment Year 2026-27 (the year that assesses Financial Year 2025-26 income) expecting a modest refund. Instead, an intimation under Section 143(1) of the Income Tax Act 1961 arrived showing a demand of Rs 26,260. Nothing in your salary changed; the figure the Centralised Processing Centre (CPC) allowed as tax deducted at source (TDS) is simply lower than what you claimed. This is a tax credit mismatch, and in AY 2026-27 it remains one of the single most common reasons a genuine refund flips into a demand.

The mismatch surfaces when the TDS, tax collected at source (TCS), advance tax or self-assessment tax you entered in your ITR does not tally with the entries in your Form 26AS. The Income Tax Department's Tax Credit Mismatch service, reached via Dashboard > Services > Tax Credit Mismatch, lists every line where the two records diverge for a chosen Assessment Year and lets you download the result as a PDF or XLS. Because CPC processes your return against the credits it can actually see, even Rs 31,000 of correctly deducted tax that never reached your 26AS is treated as never paid.

The three usual triggers, all documented on incometax.gov.in, are a deductor who filed its quarterly TDS statement late or not at all, a deductor who quoted the wrong PAN so the credit parked against another taxpayer, and a filer who typed the TAN or challan figure incorrectly in the ITR. Each has a different fix, and Section 205 of the Act decides who bears the demand when the fault lies with the deductor rather than with you.

Statutory Answer

The right to TDS credit flows from Section 199(1) of the Income Tax Act 1961, which provides that any tax deducted and paid to the Central Government is treated as a payment of tax on behalf of the person from whose income it was deducted. Sub-section (3) leaves the mechanics to the rules, and Rule 37BA of the Income Tax Rules 1962 carries the operative detail that decides your match.

Rule 37BA(1) ties your credit to the information furnished by the deductor in its TDS statement, which means the credit CPC grants is built from the deductor's filing and not from your Form 16 or salary slip. This is the structural reason a mismatch can exist at all: if the deductor has not reported the deduction against your PAN, the system has nothing to match, however genuine your TDS certificate. Rule 37BA(3) further requires that credit be given in the Assessment Year in which the corresponding income is assessable, so a deduction shown against the wrong year also breaks the reconciliation.

Form 26AS is itself now a statutory annual statement under Section 285BB, inserted by the Finance Act 2020 with effect from 1 June 2020 and read with Rule 114-I of the Income Tax Rules. You reach it through e-File > Income Tax Returns > View Form 26AS, which redirects to the TDS-CPC (TRACES) portal. The wider Annual Information Statement captures more sources such as SFT reporting, but for a pure TDS reconciliation the 26AS remains the reference the return is matched against.

Where the deductor is at fault, Section 205 offers a genuine shield: it bars a direct demand on the assessee to the extent tax has been deducted from their income. The CBDT reinforced this through Office Memorandum F.No.275/29/2014-IT(B) dated 11 March 2016, directing assessing officers not to enforce demands that arise purely because a deductor failed to deposit or report TDS already withheld. You must still raise the mismatch, because CPC's automated processing under Section 143(1) cannot apply Section 205 on its own before it issues the intimation.

If a demand has already been raised, two provisions reopen the record. Section 154 allows rectification of a mistake apparent from the record, the correct route when the TDS is now visible in 26AS but was not allowed at processing. Section 139(5) allows a revised return up to 31 December 2026 for AY 2026-27, the correct route when your original ITR itself carried a wrong TAN, challan number or credit figure.

Worked Resolution

Consider Priya, a salaried employee with gross salary of Rs 14,00,000 for FY 2025-26 who also earned Rs 60,000 of bank fixed-deposit interest. Under the new tax regime she claims the standard deduction of Rs 75,000, leaving a total income of Rs 13,85,000. You can reproduce every figure below in our income tax calculator and compare regimes in the old vs new regime tool.

Her tax under the FY 2025-26 new-regime slabs works out as follows. Because her total income of Rs 13,85,000 exceeds Rs 12,00,000, the enhanced Section 87A rebate of Rs 60,000 does not apply, so the full slab tax stands.

Priya's employer deducted Rs 90,000 of salary TDS and her bank deducted Rs 6,000 on the fixed deposit at 10% under Section 194A, so Rs 96,000 was genuinely withheld and she claimed all of it. On those numbers she is owed a refund of Rs 4,740. Her Form 26AS, however, shows only Rs 65,000, because the employer's Q4 (Jan-Mar 2026) statement was filed late and understated by Rs 25,000, while the bank quoted the wrong PAN and Rs 6,000 vanished from her record. The table below reconciles the two.

CPC can only allow the Rs 65,000 it can see, so instead of refunding Rs 4,740 it raises a demand of Rs 26,260 (Rs 91,260 tax minus Rs 65,000 credit). The Rs 31,000 swing between the two outcomes is entirely a reporting failure, not a tax liability. You can sanity-check the withholding itself in our TDS calculator.

The fix depends on who caused the gap. For the employer's Rs 25,000 shortfall and the bank's misquoted PAN, Priya must ask each deductor to file or correct its quarterly TDS statement on the TRACES portal; once the corrected credit appears in 26AS, she files a rectification under Section 154 so CPC re-processes with the full Rs 96,000. Had the error instead been a wrong TAN typed into her own return, she would file a revised return under Section 139(5) by 31 December 2026. The routing table below maps each cause to its remedy.

FAQ

What exactly is a tax credit mismatch?

A tax credit mismatch is a line-by-line difference between the TDS, TCS, advance tax or self-assessment tax you claimed in your ITR and the amount reflected in Form 26AS for the same Assessment Year. Under Rule 37BA(1) of the Income Tax Rules 1962 your credit is built from the deductor's statement, so any figure missing from 26AS is not allowed at processing, even if your Form 16 shows it. In Priya's case the gap was Rs 31,000.

How do I use the Tax Credit Mismatch service on the e-filing portal?

Log in at incometax.gov.in and go to Dashboard > Services > Tax Credit Mismatch, then select the relevant Assessment Year, for example AY 2026-27. The service lists each discrepancy across TDS, TCS, advance tax and self-assessment tax and lets you download the result as a PDF or XLS. Cross-check every entry against your Form 26AS, viewed via e-File > Income Tax Returns > View Form 26AS, which opens the TRACES portal.

Can I be forced to pay tax my employer deducted but never deposited?

No. Section 205 of the Income Tax Act 1961 bars a direct demand on you to the extent tax was deducted from your income, and CBDT Office Memorandum F.No.275/29/2014-IT(B) dated 11 March 2016 instructs assessing officers not to enforce demands caused solely by a deductor's default. You still have to raise the point, because the automated Section 143(1) intimation cannot invoke Section 205 by itself before demanding the Rs 25,000 shortfall.

Should I file a revised return or a rectification?

File a rectification under Section 154 when the TDS is now correct in Form 26AS but CPC did not allow it at processing, since that is a mistake apparent from the record. File a revised return under Section 139(5), available until 31 December 2026 for AY 2026-27, when the error is inside your original return, such as a wrong TAN or a mistyped credit figure. Using the wrong route simply delays the Rs 4,740 refund.

How long does a deductor's correction take to show in Form 26AS?

There is no fixed turnaround, but the credit can only appear after the deductor files or revises its quarterly TDS statement on TRACES and that statement is processed. The statutory due dates are 31 July, 31 October and 31 January for the first three quarters and 31 May for the Q4 (Jan-Mar) statement, so a Q4 salary correction chased in mid-2026 typically reflects only after the revised return is accepted. Verify in 26AS before filing your Section 154 rectification.

Does the Annual Information Statement replace Form 26AS for this check?

Not for TDS reconciliation. Form 26AS remains the statutory statement under Section 285BB and Rule 114-I against which your return's TDS credit is matched, while the Annual Information Statement adds broader data such as SFT and interest reporting. For a mismatch dispute you should reconcile the return against 26AS first, then use AIS feedback for any income figure that looks wrong.

What if the mismatch is in advance tax or self-assessment tax rather than TDS?

Then the fault is usually a wrong challan detail rather than a deductor. Compare the BSR code, challan serial number and payment date in your ITR against the challan shown in Form 26AS; a single wrong digit parks the payment elsewhere. Correct it through a challan correction request or a Section 139(5) revised return before 31 December 2026 so the self-assessment tax credit is restored.